StringStream in C++ for Decimal to Hexadecimal and back

Stringstream is stream class present in C++ which is used for doing operations on a string. It can be used for formatting/parsing/converting a string to number/char etc.Hex is an I/O manipulator that takes reference to an I/O stream as parameter and returns reference to the stream after manipulation.
Here is a quick way to convert any decimal to hexadecimal using stringstream:

// CPP program to convert integer to

// hexadecimal using stringstream and

// hex I/O manipulator.

#include <bits/stdc++.h>

usingnamespacestd;

intmain()

{

inti = 942;

stringstream ss;

ss << hex << i;

string res = ss.str();

cout << "0x"<< res << endl; // this will print 0x3ae

return0;

}

Output:

0x3ae

If we want to change hexadecimal string back to decimal you can do it by following way:

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.